ES2435340R1 - Fixing system for wind turbines and method of placement - Google Patents

Fixing system for wind turbines and method of placement Download PDF

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Publication number
ES2435340R1
ES2435340R1 ES201200643A ES201200643A ES2435340R1 ES 2435340 R1 ES2435340 R1 ES 2435340R1 ES 201200643 A ES201200643 A ES 201200643A ES 201200643 A ES201200643 A ES 201200643A ES 2435340 R1 ES2435340 R1 ES 2435340R1
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ES
Spain
Prior art keywords
application
date
flange
state
art
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
ES201200643A
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Spanish (es)
Other versions
ES2435340B1 (en
ES2435340A2 (en
Inventor
Daniel Artal Lorente
Fernando De Las Cuevas Jimenez
Fermin Lazcoz Santesteban
Pedro Munarriz Andres
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Gamesa Renewable Energy Innovation and Technology SL
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Gamesa Innovation and Technology SL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gamesa Innovation and Technology SL filed Critical Gamesa Innovation and Technology SL
Priority to ES201200643A priority Critical patent/ES2435340B1/en
Priority to PL13002992T priority patent/PL2674611T3/en
Priority to EP13002992.9A priority patent/EP2674611B1/en
Priority to ES13002992.9T priority patent/ES2620577T3/en
Priority to BR102013014925-0A priority patent/BR102013014925B1/en
Priority to US13/918,105 priority patent/US9175667B2/en
Priority to CN201310239102.4A priority patent/CN103511194B/en
Publication of ES2435340A2 publication Critical patent/ES2435340A2/en
Publication of ES2435340R1 publication Critical patent/ES2435340R1/en
Application granted granted Critical
Publication of ES2435340B1 publication Critical patent/ES2435340B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/022—Adjusting aerodynamic properties of the blades
    • F03D7/0224—Adjusting blade pitch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0691—Rotors characterised by their construction elements of the hub
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0658—Arrangements for fixing wind-engaging parts to a hub
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/60—Shafts
    • F05B2240/61—Shafts hollow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05B2260/79—Bearing, support or actuation arrangements therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/50—Flanged connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/50—Flanged connections
    • F16B2200/506—Flanged connections bolted or riveted
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/30—Wind power
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/49332—Propeller making

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wind Motors (AREA)
  • User Interface Of Digital Computer (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

Sistema de fijación para aerogeneradores caracterizado por estar formado por una brida delantera (9) y una brida trasera (8) solidarias entre sí, que se soportan sobre el eje rotatorio hueco (2) y se unen al sistema de pitch que componen los rodamientos (6) del eje y la pieza en estrella (4). El método de fijación une la brida trasera (8) al eje hueco (2) con un collarín cónico (10) y por mediación de unos casquillos (11) distanciadores se une también a la brida delantera (9). El collarín (10) transmite por fricción mayores momentos y esfuerzos axiales mejorando el sistema de fijación, y la orientación de los tornillos del collarín (10) y de los tornillos (12) de los casquillos distanciadores (11) facilitan la inspección y el mantenimiento.Fixing system for wind turbines characterized by being formed by a front flange (9) and a rear flange (8) in solidarity with each other, which are supported on the hollow rotary axis (2) and are attached to the pitch system that make up the bearings ( 6) of the shaft and the star piece (4). The fixing method joins the rear flange (8) to the hollow shaft (2) with a tapered collar (10) and by means of spacer bushes (11) it is also attached to the front flange (9). The collar (10) transmits greater moments and axial forces by friction, improving the fixing system, and the orientation of the collar screws (10) and the screws (12) of the spacer bushings (11) facilitate inspection and maintenance .

Claims (2)

OFICINA ESPAÑOLA DE PATENTES Y MARCAS SPANISH OFFICE OF THE PATENTS AND BRAND N.º solicitud: 201200643 Application no .: 201200643 ESPAÑA SPAIN Fecha de presentación de la solicitud: 15.06.2012 Date of submission of the application: 06.15.2012 Fecha de prioridad: Priority Date: INFORME SOBRE EL ESTADO DE LA TECNICA REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl. : F03D1/06 (2006.01) F03D7/02 (2006.01) 51 Int. Cl.: F03D1 / 06 (2006.01) F03D7 / 02 (2006.01) DOCUMENTOS RELEVANTES  RELEVANT DOCUMENTS
Categoría Category
56 Documentos citados Reivindicaciones afectadas 56 Documents cited Claims Affected
A TO
WO 2012069062 A1 (VESTAS WIND SYS AS et al.) 31.05.2012, 1-6 WO 2012069062 A1 (VESTAS WIND SYS AS et al.) 05/31/2012, 1-6
párrafos [9-14]; figuras 2-3. paragraphs [9-14]; Figures 2-3.
A TO
US 2008191488 A1 (KIRCHNER JENS et al.) 14.08.2008, 1-6 US 2008191488 A1 (KIRCHNER JENS et al.) 08.08.2008, 1-6
párrafos [11-16]; figuras 1-3. paragraphs [11-16]; Figures 1-3.
A TO
US 2011142618 A1 (MOORE BRADLEY GRAHAM) 16.06.2011, 1-6 US 2011142618 A1 (MOORE BRADLEY GRAHAM) 16.06.2011, 1-6
párrafos [4-6]; figuras 2-4. paragraphs [4-6]; Figures 2-4.
Categoría de los documentos citados X: de particular relevancia Y: de particular relevancia combinado con otro/s de la misma categoría A: refleja el estado de la técnica O: referido a divulgación no escrita P: publicado entre la fecha de prioridad y la de presentación de la solicitud E: documento anterior, pero publicado después de la fecha de presentación de la solicitud Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application
El presente informe ha sido realizado • para todas las reivindicaciones • para las reivindicaciones nº: This report has been prepared • for all claims • for claims no:
Fecha de realización del informe 06.02.2014 Date of realization of the report 06.02.2014
Examinador M. A. López Carretero Página 1/4 Examiner M. A. López Carretero Page 1/4
INFORME DEL ESTADO DE LA TÉCNICA REPORT OF THE STATE OF THE TECHNIQUE Nº de solicitud: 201200643 Application number: 201200643 Documentación mínima buscada (sistema de clasificación seguido de los símbolos de clasificación) F03D Bases de datos electrónicas consultadas durante la búsqueda (nombre de la base de datos y, si es posible, términos de Minimum documentation sought (classification system followed by classification symbols) F03D Electronic databases consulted during the search (name of the database and, if possible, terms of búsqueda utilizados) INVENES, EPODOC search used) INVENES, EPODOC Informe del Estado de la Técnica Página 2/4 State of the Art Report Page 2/4 OPINIÓN ESCRITA WRITTEN OPINION Nº de solicitud: 201200643 Application number: 201200643 Fecha de Realización de la Opinión Escrita: 06.02.2014 Date of Completion of Written Opinion: 06.02.2014 Declaración Statement
Novedad (Art. 6.1 LP 11/1986) Novelty (Art. 6.1 LP 11/1986)
Reivindicaciones Reivindicaciones 1-6 SI NO Claims Claims 1-6 IF NOT
Actividad inventiva (Art. 8.1 LP11/1986) Inventive activity (Art. 8.1 LP11 / 1986)
Reivindicaciones Reivindicaciones 1-6 SI NO Claims Claims 1-6 IF NOT
Se considera que la solicitud cumple con el requisito de aplicación industrial. Este requisito fue evaluado durante la fase de examen formal y técnico de la solicitud (Artículo 31.2 Ley 11/1986). The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986). Base de la Opinión.-  Opinion Base.- La presente opinión se ha realizado sobre la base de la solicitud de patente tal y como se publica. This opinion has been made on the basis of the patent application as published. Informe del Estado de la Técnica Página 3/4 State of the Art Report Page 3/4 OPINIÓN ESCRITA WRITTEN OPINION Nº de solicitud: 201200643 Application number: 201200643 1. Documentos considerados.-  1. Documents considered.- A continuación se relacionan los documentos pertenecientes al estado de la técnica tomados en consideración para la realización de esta opinión. The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.
Documento Document
Número Publicación o Identificación Fecha Publicación Publication or Identification Number publication date
D01 D01
WO 2012069062 A1 (VESTAS WIND SYS AS et al.) 31.05.2012 WO 2012069062 A1 (VESTAS WIND SYS AS et al.) 05/31/2012
D02 D02
US 2008191488 A1 (KIRCHNER JENS et al.) 14.08.2008 US 2008191488 A1 (KIRCHNER JENS et al.) 08/14/2008
D03 D03
US 2011142618 A1 (MOORE BRADLEY GRAHAM) 16.06.2011 US 2011142618 A1 (MOORE BRADLEY GRAHAM) 06-16-2011
2. Declaración motivada según los artículos 29.6 y 29.7 del Reglamento de ejecución de la Ley 11/1986, de 20 de marzo, de Patentes sobre la novedad y la actividad inventiva; citas y explicaciones en apoyo de esta declaración  2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement La presente solicitud de patente en su reivindicación independiente 1 describe un sistema de fijación utilizado para la unión entre el eje rotatorio y el sistema de pitch de un aerogenerador, caracterizada porque -está compuesto por una doble brida formada por una brida delantera y una brida trasera solidarias entre sí -la brida delantera se ancla al eje empujador y al sistema de pitch formado por la pieza en estrella, -la brida trasera atravesada por el eje rotatorio hueco y que trabaja a fricción sobre él y -ambas bridas, la delantera y la trasera, se unen entre ellas con dos o más casquillos. En la reivindicación independiente 6 de la solicitud de patente se describe además un método de fijación, caracterizado porque sigue los siguientes pasos: -bloqueo del sistema de pitch fijando la estrella al buje mediante las flechas y tacos de bloqueo -retirar la caja de rodamientos, la brida y desplazar el eje hueco fuera de la estrella con el cono empujador -colocación del collarín cónico sobre el eje hueco -colocar la brida trasera orientada de forma que los casquillos que unen ambas bridas queden entre los brazos de la estrella -recolocar el eje hueco, añadir la brida delantera y la caja de rodamientos -fijar todos los elementos, colocar los casquillos con sus correspondientes tuercas y dar par de apriete al collarín cónico. Los documentos citados D1-D3 muestran distintos sistemas de pitch, con diversas configuraciones, elementos de rigidización y bridas que se utilizan en el montaje para fines muy distintos de los usados en la presente solicitud. Ninguno de los documentos anteriores muestra un sistema ni un método de fijación que une mediante una brida el eje hueco con el sistema de pitch, tal y como se detalla en la invención; mostrando en definitiva el estado de la técnica. Por lo tanto se puede considerar que la invención es nueva e implica actividad inventiva tal y como requieren los Arts. 6.1 y 8.1 de la Ley de Patentes 11/86. The present patent application in its independent claim 1 describes a fixing system used for the connection between the rotary axis and the pitch system of a wind turbine, characterized in that it is composed of a double flange formed by a front flange and a rear flange. Solidarity with each other -the front flange is anchored to the pusher shaft and to the pitch system formed by the star piece, -the rear flange pierced by the hollow rotary axis and which works on it and -both flanges, the front and the rear, they join each other with two or more bushings. In the independent claim 6 of the patent application a fixing method is further described, characterized in that it follows the following steps: -blocking the pitch system by fixing the star to the bushing by means of the arrows and locking blocks -removing the bearing housing, the flange and move the hollow shaft out of the star with the pusher cone - placing the conical collar on the hollow shaft - place the rear flange oriented so that the bushings that join both flanges are between the arms of the star - reposition the shaft hollow, add the front flange and the bearing housing - fix all the elements, place the bushings with their corresponding nuts and tighten the conical collar. The documents cited D1-D3 show different pitch systems, with various configurations, stiffening elements and flanges that are used in the assembly for purposes very different from those used in the present application. None of the above documents show a system or a fixing method that joins the hollow shaft with the pitch system by means of a flange, as detailed in the invention; definitely showing the state of the art. Therefore it can be considered that the invention is new and implies inventive activity as required by the Arts. 6.1 and 8.1 of Patent Law 11/86. Informe del Estado de la Técnica Página 4/4 State of the Art Report Page 4/4
ES201200643A 2012-06-15 2012-06-15 Fixing system for wind turbines and method of placement Expired - Fee Related ES2435340B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
ES201200643A ES2435340B1 (en) 2012-06-15 2012-06-15 Fixing system for wind turbines and method of placement
EP13002992.9A EP2674611B1 (en) 2012-06-15 2013-06-12 Fastening system for wind turbines and corresponding installation methods
ES13002992.9T ES2620577T3 (en) 2012-06-15 2013-06-12 Fixing system for wind turbines and method of placement
PL13002992T PL2674611T3 (en) 2012-06-15 2013-06-12 Fastening system for wind turbines and corresponding installation methods
BR102013014925-0A BR102013014925B1 (en) 2012-06-15 2013-06-14 FIXING SYSTEM FOR THE JOINT BETWEEN A ROTARY AXLE AND A WIND TURBINE STEP SYSTEM AND FIXING METHOD
US13/918,105 US9175667B2 (en) 2012-06-15 2013-06-14 Fastening system for wind turbines and corresponding installation methods
CN201310239102.4A CN103511194B (en) 2012-06-15 2013-06-17 Fastening system and corresponding installation method for wind turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201200643A ES2435340B1 (en) 2012-06-15 2012-06-15 Fixing system for wind turbines and method of placement

Publications (3)

Publication Number Publication Date
ES2435340A2 ES2435340A2 (en) 2013-12-18
ES2435340R1 true ES2435340R1 (en) 2014-02-20
ES2435340B1 ES2435340B1 (en) 2014-12-05

Family

ID=48669744

Family Applications (2)

Application Number Title Priority Date Filing Date
ES201200643A Expired - Fee Related ES2435340B1 (en) 2012-06-15 2012-06-15 Fixing system for wind turbines and method of placement
ES13002992.9T Active ES2620577T3 (en) 2012-06-15 2013-06-12 Fixing system for wind turbines and method of placement

Family Applications After (1)

Application Number Title Priority Date Filing Date
ES13002992.9T Active ES2620577T3 (en) 2012-06-15 2013-06-12 Fixing system for wind turbines and method of placement

Country Status (6)

Country Link
US (1) US9175667B2 (en)
EP (1) EP2674611B1 (en)
CN (1) CN103511194B (en)
BR (1) BR102013014925B1 (en)
ES (2) ES2435340B1 (en)
PL (1) PL2674611T3 (en)

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CN107620679B (en) * 2017-08-16 2020-02-11 新疆金风科技股份有限公司 Connecting structure and connecting method of blade and variable-pitch bearing and wind generating set
DK3460272T3 (en) * 2017-09-20 2020-06-02 Siemens Gamesa Renewable Energy As Method of Replacing a Bearing Component and a Tool Device for Replacing a Bearing Component
WO2020108714A1 (en) * 2018-11-27 2020-06-04 Vestas Wind Systems A/S A wind turbine blade pitch system
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Publication number Publication date
CN103511194A (en) 2014-01-15
CN103511194B (en) 2018-05-29
ES2435340B1 (en) 2014-12-05
EP2674611B1 (en) 2017-01-04
PL2674611T3 (en) 2017-07-31
BR102013014925A2 (en) 2015-07-14
BR102013014925B1 (en) 2021-11-16
US9175667B2 (en) 2015-11-03
US20130336716A1 (en) 2013-12-19
ES2620577T3 (en) 2017-06-29
EP2674611A3 (en) 2015-03-25
ES2435340A2 (en) 2013-12-18
EP2674611A2 (en) 2013-12-18

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